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PERMFILE136825
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PERMFILE136825
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Entry Properties
Last modified
8/24/2016 10:37:27 PM
Creation date
11/26/2007 5:10:54 AM
Metadata
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Template:
DRMS Permit Index
Permit No
M1988112
IBM Index Class Name
Permit File
Doc Date
3/22/1989
Doc Name
MINUTES
Media Type
D
Archive
No
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-26- <br />• hundred times of even just the mined area. The estimate is that in wetter <br />areas than this, I'll submit, that you can get 57,000 some tons per square <br />meter per year of soil erosion just from the haul roads. Square mile - every <br />square mile of the haul roads. And if you look roughly again, I don't have <br />all the data here, look roughly again at the 30 acres of haul roads that are <br />proposed within this area, one acre is 640th of a square mile so if you make a <br />calculation you find out what you have is a potential of 2,000 to 3,000 tons <br />per square mile, per year, of erosion from the haul roads. <br />Now, I do not see addressed in arty of the proceedings what will happen in <br />order to contain some of this erosion. Is this going to end up down in the <br />Rito Seco River? I don't think that has been addressed at all. It represents <br />a very major erosion potential. <br />Finally, I would like to say in terms of the maintenance of the system - <br />long term. We have sedimentation ponds that have been properly designed, <br />good engineering design, around the east and the west pits. I have no problem <br />with that. I do have a problem with the fact that a mere statement that there <br />• will be very little generation of sediment does not suffice, at Beast not for <br />me. I think that you can't help but get -- unless you have absolutely perfect <br />reclamation all along during the operation of the mine -- you're going to have <br />some sediment generation. And at the end of seven years, the enA of the nine <br />years, whatever that period is, when the sediment ponds fill and there is <br />really - and maybe it's ten years down the road - maybe it's 15 years down the <br />road -maybe it's beyond the level of whatever bond is put forth„ then what <br />happens? What happens is the sediment ponds fill and you get the run-off from <br />the sediment and you get whatever acid bearing or metal bearing materials <br />overland and probably to the Rito Seco River. I think that goes with the <br />planting also -long term maintenance. You can get an initial success of the <br />plants, you have to maintain that, you have to keep after that on the <br />long-term. The success rate is fairly low in the Colorado area. And I didn't <br />see anything really about the long-term maintenance of the reclamation in the <br />system and the maintenance of the sedimentation ponds. And I think with those <br />comments that's all I really have to say. Thank you. <br /> <br />
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